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Finding the Fourth Proportional to 496,531.28, 685,211.28 and 281,712.80

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Solution

The fourth proportional to 496,531.28, 685,211.28 and 281,712.80 is: 388,762.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    496,531.28 : 685,211.28 = 281,712.80 : x
  2. Step 2: Convert to fraction form
    496,531.28/685,211.28 = 281,712.80/x
  3. Step 3: Cross multiply
    496,531.28x = 685,211.28 × 281,712.80
  4. Step 4: Simplify right side
    496,531.28x = 193,032,788,280.38
  5. Step 5: Solve for x
    x = 193,032,788,280.38/496,531.28
  6. Step 6: Final answer
    x = 388,762.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.